You send 25 used stampsto a random memberand you receive 25 back!

Hello,
My name is Karel. I am a 48 years old stamp collector from Czech Republic.
I collect worldwide stamps. Please do not send stamps of Germany - I can use only mint (unused)
stamps from years 2001 till today. Postally (not CTO´s) used stamps of GDR (DDR) are OK.
Please do not send any definitive (common) stamps if they are older more than 3 years.
I do not need also self-adhesive stamps with "Die Cut" perforation of Australia before
year 2010 and Japanese stamps before 2000. Stamps of European countries only from 2010 till today.
I would be very grateful if you can send me some pocket calendar (card) for my friend.
I am always ready also for personal exchange by want lists with collectors who are interested
in used stamps of Czech Republic, Czechoslovakia and Germany. I use Michel and Scott
catalogue.